Add or subtract.
(7x^2-x-2)-(-6x^3+3)
Show your work.
A. 6x^3+ 7x^2-x-5
B. -6x^3+7x^2-x+1
C. -x^3-x-5
D. x^2-x+1
Solution:
(7x^2-x-2)-(-6x^3+3)
= 7x^2-x-2+6x^3-3 (distributing negative sign)
= 6x^3+7x^2-x-5
Therefore, the answer is A. 6x^3+ 7x^2-x-5.